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version 4.2 authored by Udo Ziegler's avatar Udo Ziegler
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3-NIRVANA-user-guide/3.1-Code-basics.md
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...@@ -195,7 +195,7 @@ in that list the next superblock is given by the 'next grid' operator ...@@ -195,7 +195,7 @@ in that list the next superblock is given by the 'next grid' operator
The list ends if the next grid pointer is a NULL pointer. The following The list ends if the next grid pointer is a NULL pointer. The following
image illustrates the linked list concept. image illustrates the linked list concept.
![linked-list-concept](uploads/7e311eea207cfd20102f732360c219c5/linked-list-concept.png){width=80%} ![linked-list-concept](uploads/7e311eea207cfd20102f732360c219c5/linked-list-concept.png){width=70%}
Assuming a serial run for the moment, looping over all superblocks `g` Assuming a serial run for the moment, looping over all superblocks `g`
of mesh refinement level $l$ (index `il`) is as simple as of mesh refinement level $l$ (index `il`) is as simple as
...@@ -405,9 +405,7 @@ individually selected by the user. The standard implementation covers ...@@ -405,9 +405,7 @@ individually selected by the user. The standard implementation covers
the following criteria: the following criteria:
- derivatives-based (most important in practice): - derivatives-based (most important in practice):
![amr_deriv](uploads/25c608e1a335aca4242b34afb9e4ffeb/amr_deriv.png){width=80%} ![amr_deriv](uploads/25c608e1a335aca4242b34afb9e4ffeb/amr_deriv.png){width=80%}
The criterion is applied to physical variables $U$ The criterion is applied to physical variables $U$
($=\{\varrho,\mathbf{m},e,\mathbf{B},C_\mathrm{c}\}$). Undivided ($=\{\varrho,\mathbf{m},e,\mathbf{B},C_\mathrm{c}\}$). Undivided
first ($\delta U$) and second ($\delta^2U$) differences are computed along first ($\delta U$) and second ($\delta^2U$) differences are computed along
......